feat: Add CI/CD pipeline with Docker build and K8s deployment

Add Dockerfile (multi-stage, python:3.11-slim + uv), K8s manifests
(Deployment + Service), and extend CI workflow with build-push-deploy
stages targeting Gitea registry and K3s.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: Python CI
+name: CI/CD
 
 on:
   push:
@@ -11,20 +11,62 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      
+
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
           python-version: '3.11'
-      
+
       - name: Install uv
         run: pip install uv
-      
+
       - name: Install dependencies
-        run: uv pip install --system -e ".[dev]" || uv pip install --system -e .
-      
+        run: uv pip install --system -e "haproxy_mcp[dev]" || uv pip install --system -e haproxy_mcp
+
       - name: Lint with ruff
         run: ruff check . || true
-      
+
       - name: Type check
         run: mypy . --ignore-missing-imports || true
+
+  build-and-deploy:
+    needs: test
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea Registry
+        run: echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login gitea.anvil.it.com -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
+
+      - name: Build and push Docker image
+        run: |
+          IMAGE=gitea.anvil.it.com/kaffa/haproxy-mcp
+          TAG=${GITHUB_SHA::8}
+          docker buildx build \
+            --platform linux/amd64 \
+            --tag ${IMAGE}:${TAG} \
+            --tag ${IMAGE}:latest \
+            --push \
+            .
+
+      - name: Deploy to K8s
+        env:
+          KUBECONFIG_DATA: ${{ secrets.KUBECONFIG }}
+        run: |
+          mkdir -p ~/.kube
+          echo "${KUBECONFIG_DATA}" | base64 -d > ~/.kube/config
+          chmod 600 ~/.kube/config
+
+          IMAGE=gitea.anvil.it.com/kaffa/haproxy-mcp
+          TAG=${GITHUB_SHA::8}
+
+          kubectl set image deployment/haproxy-mcp \
+            haproxy-mcp=${IMAGE}:${TAG} \
+            -n default
+
+          kubectl rollout status deployment/haproxy-mcp \
+            -n default --timeout=120s